hey guys could you give me some tips on how to "make some adjustments" on my 383sbc camaro to pass aircare? It has a holley 670 street avenger carb and base timing is at around 12 degrees. I doubt it would pass air care with this much advance so what should I do to help my chances? I was told to lean it right out and retard the timing but more specifics would be great.

hey guys could you give me some tips on how to "make some adjustments" on my 383sbc camaro to pass aircare? It has a holley 670 street avenger carb and base timing is at around 12 degrees. I doubt it would pass air care with this much advance so what should I do to help my chances? I was told to lean it right out and retard the timing but more specifics would be great.

Will it matter that this is a 383 and not the lame 350 that came stock in the 1980 z28? What I'm asking is do they measure how much (quantity) of exhaust is coming out your pipes or is it the ppm of the greenhouse gases they are looking for? If they do measure the quantity of exhaust coming out of the pipes I'm sure a 383 will push out dramatically more than the stock 350. Also I am not very good at tuning carb's and I haven't touched this 1 since it came new out of the box, just bolted it on and adjusted the choke. It is a holley 670 street avenger vacuum secondaries and is said to be tuned at the factory for most applications, do you think by backing off my timing I would porbably be good enough since I am not quite sure how to lean out a carb to be honoust with you.

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